/*
 * Copyright 2018 VMware, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micrometer.core.instrument.util;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

public class NamedThreadFactory implements ThreadFactory {

    private final AtomicInteger sequence = new AtomicInteger(1);

    private final String prefix;

    public NamedThreadFactory(String prefix) {
        this.prefix = prefix;
    }

    @Override
    public Thread newThread(Runnable r) {
        Thread thread = new Thread(r);
        int seq = sequence.getAndIncrement();
        thread.setName(prefix + (seq > 1 ? "-" + seq : ""));
        thread.setDaemon(true);
        return thread;
    }

}
